PETALOBO:!?!!!)^®. 
39 
Janassa gurleiatm, E. D. Cope, Amer. Nat. 1881, p. 103, and 
Trans. Amer. Phil. Soc. vol. xvi. (1887), p. 285; Stri- 
gxlina gitrleiana, Proc. Amer. Phil. Soc. vol. xvii. (1878), 
p. 191. — Danville, Illinois. 
Janassa ordiana, E. D. Cope, Amer. Nat. 1881, p. 103, and 
Trans. Amor. Phil. Soc. vol. xvi. (1887), p. 285 (name 
only). — Texas. 
The detached teeth described under the following names also 
appear to be referable to Janassa, as here defined : — 
Climaxodus hrevis, J. S. Newberry, Proc. Acad. Nat. Sci. Philad. 
1850, p. 100. — Coal-Measures ; Ohio. 
Pellodus qaadratus, 0. St. John & A. H. M'orthen, Pal. Illinois, 
vol. vi. (1875), p. 410, pi. xiii. figs. 0, 7. — St. Louis Lime- 
stone ; Illinois, Missouri. 
PeJtodus plicomphalus, St. John & Worthen, tom. cit. p. 411, 
pi. xiii. fig. 9. — Chester Limestone ; Illinois. 
Peltodus transversiis, St. John & IVorthen, tom. cil. p. 412, pi. xiii. 
fig. 8. — Coal-Measures ; Illinois. 
Pdtodus unguiformis, Newberry & Worthen, Pal. lU. vol. iv. 
(1870), p. 303, pi. ii. fig. 7. — U. Coal-Measures ; Illinois. 
Tanaodus bellicinctus, St. John & IVorthen, tom. cit. p. 370, pi. xi. 
figs. 14^10, 25. — Chester Limestone ; Illinois. 
Tanaodus depressus, St. John & Mhrthen, tom. cit. j). 378, pi. xi. 
figs. 11-13. — Chester Limestone ; Illinois. 
Tanaodus gross! plicatus, St. John & AVorthen, tom. cit. p. 375, 
pi. xi. fig. 20. — Chester Limestone ; Illinois. 
Tanaodus pohjmorphus, St. John & Worthen, tom. cit. p. 380, pi. xi. 
figs. 17-19, 24. — Chester Limestone ; Illinois. 
Tanaodus prtcnuntius, St. John & Worthen, tom. cit. p. 371, pi. xi, 
tigs. 6-10. — St. Louis Limestone ; Illinois, Iowa, Missouri. 
Tanaodus pumilus, St. John & Worthen, tom. cit. p. 369, jd. xi. 
figs. 1-5. — St. Louis Limestone ; Illinois, Iowa. 
Tanaodus satlptus, St. John & IVorthen, tom. cit. p. 37-3, pi. xi. 
figs. 20-23. — St. Louis Limestone ; Illinois, Iowa,Missouri. 
Tanaodus sublunatus, St. John& Worthen, tom. cit. p. 368, pi. xi. 
fig. 27. — St. Louis Limestone ; Iliinois. 
The genus and species Thoracodus emydinus, Cope (Proc. Acad. 
Philad. 1883, p. 108), is founded upon fossils from the Permian of 
Illinois, evidently eorrespondbg each to half of a bilateral tooth 
having the characters of that of Janassa. Cymatodus ohlonyus, 
Newberry & Worthen (Pal. 111. vol. iv. p. 364, pi. iv. fig. 7), from 
the Coal-Measures of Illinois, also seems to be related to Janassa. 
